arch/mips/kernel/prom.c

   1 /*
   2  * MIPS support for CONFIG_OF device tree support
   3  *
   4  * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/export.h>
  13 #include <linux/errno.h>
  14 #include <linux/types.h>
  15 #include <linux/bootmem.h>
  16 #include <linux/debugfs.h>
  17 #include <linux/of.h>
  18 #include <linux/of_fdt.h>
  19
  20 #include <asm/page.h>
  21 #include <asm/prom.h>
  22
  23 static char mips_machine_name[64] = "Unknown";
  24
  25 __init void mips_set_machine_name(const char *name)
  26 {
  27         if (name == NULL)
  28                 return;
  29
  30         strlcpy(mips_machine_name, name, sizeof(mips_machine_name));
  31         pr_info("MIPS: machine is %s\n", mips_get_machine_name());
  32 }
  33
  34 char *mips_get_machine_name(void)
  35 {
  36         return mips_machine_name;
  37 }
  38
  39 #ifdef CONFIG_OF
  40 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
  41 {
  42         return add_memory_region(base, size, BOOT_MEM_RAM);
  43 }
  44
  45 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
  46 {
  47         return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
  48 }
  49
  50 int __init early_init_dt_scan_model(unsigned long node, const char *uname,
  51                                     int depth, void *data)
  52 {
  53         if (!depth) {
  54                 char *model = of_get_flat_dt_prop(node, "model", NULL);
  55
  56                 if (model)
  57                         mips_set_machine_name(model);
  58         }
  59         return 0;
  60 }
  61
  62 void __init __dt_setup_arch(struct boot_param_header *bph)
  63 {
  64         if (!early_init_dt_scan(bph))
  65                 return;
  66
  67         /* try to load the mips machine name */
  68         of_scan_flat_dt(early_init_dt_scan_model, NULL);
  69 }
  70 #endif